John Ramsey of St George's Medical School, director of the Tictac programme, said oxycodone had emerged in the UK for the first time.
"Oxycodone is a big problem in the United States and we have been expecting it over here.
Now it has appeared," said Mr Ramsey
said it was not known if the person who had brought the drug to the club had intended to use it to commit an offence or if it was for their own personal use.
It was important that people were aware of the risks of date rape, he
said, but stressed that the chances of it happening were still quite low.
Nevertheless, it's wise for people, particularly during the festive season, to be aware of the risks and to take precautions to prevent becoming a victim, he
"It is an important time to remind people that they are responsible for their own safety," he
said the Tictac database was also regularly picking up GHB - gamma hydroxy butyrate, also known as liquid ecstacy - in the club scene.
Comment: Good to see the esteemable John Ramsey
getting the point across and TicTac being put to such good use.